Error when accessing a newly created PWA Instance: Project Online

Upon requirement, created a PWA site thru SharePoint Admin center. Create Site > Other Options > Choose a template "Project Web App Site". Added myself as Primary Administrator.

Open MFA enabled SharePoint Online site with SharePoint Designer 2013

If your tenant has multi-factor authentication turned on, your Internet Explorer was disabled, with Edge as default browser, and you were trying to use SharePoint Designer 2013, you will encounter the error shown below.

"The Web Server does not appear to have any authentication methods enabled. It asked for user authentication, but did not send a WWW-Authenticate header." 

This was because Office 2016 and Older Versions use Basic Authentication method.

As SharePoint Designer 2013 was part of Office 2013 clients, and to overcome this, you need to enable Modern Authentication.

To enable modern authentication for any devices running Windows, you need to set the following registry keys. 

Once the above Registry Keys were added with Hexadecimal value 1, then it should look as shown below.

Open the SharePoint Designer 2013, Go to Account. It should show your login info.

 Now try to open the SharePoint Online Site Collection, it opened like charm.

Adding or updating the Primary admin for any SPO Site Collection thru PowerShell Commands.

In this post, we want to achieve the ability of adding or updating the Primary admin for any Site Collection thru PowerShell Commands.

With the new features in SharePoint Admin center, we lost the ability to change the Primary Admin for any Site Collection thru 'Permissions' feature. With new 'Membership' feature, we can add Site admins, Site Owners, Site Members and Site Visitors, but cannot add or update any Site admin(s) as Primary Admin.

With the below PowerShell Commands are updating the Primary Admin from Venugopal Reddy (gvr@gurram.onmicrosoft.com) to Mahin Gurram (gmr@gurram.onmicrosoft.com)

#Variables

$SiteCollURL = "https://gurram.sharepoint.com/sites/smb"

$SiteOwner = "gmr@gurram.onmicrosoft.com"

#Connect to SharePoint Online

Connect-SPOService

#The above Command will prompt you enter SharePoint Admin URL & dialog box to enter your SharePoint Admin Credentials

#Sharepoint online powershell Set Site Owner (Primary Admin) - with Variables

Set-SPOSite -Identity $SiteCollURL -Owner $SiteOwner -NoWait

#Sharepoint online powershell Set Site Owner (Primary Admin) - Direct Command

Set-SPOSite -Identity https://gurram.sharepoint.com/sites/smb -Owner gmr@gurram.onmicrosoft.com -NoWait

After running the above Commands, below is the PowerShell Screen.

The required Site Collection's Primary Admin was updated.